Dog for lathes.



PATENTED APR. 12, 19014.

G. E. BROWN. DOG POB. LATHES.' PPLIoATIoN FILED nu. 14, 190s.

N0 MODEL.

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UNITED STATES YJatented April 12, 1904.

CHARLES EVAN BROWN, OF ALLEGHENY, PENNSYLVANIA.

DOG FOR LATH ES.

SPECIFICATION `forming part of Letters Patent No. 757,255, dated April 12, 1904.

Application led March 14, 1903.

To a/Z whom, t may con/cern:

Be it known that I, CHARLES EvAN BROWN, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Dogs for Lathes, of which improvement the following is a specification.

This invention relates to an improved dog for lathes; and it consists in the certain details of construction and combination of parts, as will be 4fully described hereinafter.

In the accompanying drawings, Figure 1 is a front elevation of my improved dog for use upon lathes, having the front plate removed therefrom, the same being constructed and arranged in accordance with my invention. Fig. 2 is a sectional side elevation of the same, the said section taken on the lineX X of Fig. l. Fig. 3 is a plan view of the same.

To put my invention into practice, and thereby provide a device for lathes known in the art as a dog, I form from suitable material an annular plate 4, having a central opening through which the piece passes for 'connection with the center point 2 of the face-plate 1 and the said face-platebeing provided with an outwardly-projecting pin 3, as shown at Figs.v 1 and 2 of the drawings. This annular portion 4. is formed with a recess and tted with a front plate 13, attached thereto by means of screws 14, also with a stationary segmental serrated bar 5, held in position by countersunk screws 6. Diametrically opposite this stationary serrated portion 5 is another concaved serrated bar, 8, similar in construction, only attached in position by a pivot 7 and Serial No. 147,715. (No model.)

formed with an integral lever portion 10,

.adapted to engage with the above-mentioned be readily understood by those skilled in the art.

Slight modifications and changes may be made in the details of construction without departing from the spirit of the invention. Therefore I do not wish to confine myself to that shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In combination, a circular platell having' a circular flange extending part way around it, an annular plate 13 secured to the iange, a stationary concaved serrated bar 5 seated in said plate 4., a pivoted serrated bar 8, having a lever and extending beyond the circumferences of said plates and limited in its movements by the ends of the flange of said plate 4., and a spring pressing against said pivoted bar, as set forth.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES EVAN BROWN.

In presence of- JOHN GROETZINGER, 'H. J. LEVIS. 

